Limitation of the thermal-lens method in fluorescence quantum-yield measurements

1990 ◽  
Vol 171 (4) ◽  
pp. 347-352 ◽  
Author(s):  
A. Chartier ◽  
J. Georges ◽  
J.M. Mermet
Keyword(s):  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield

scholarly journals Fluorescence quantum yield of Yb 3+ -doped tellurite glasses determined by thermal lens spectroscopy

2017 ◽  
Vol 63 ◽  
pp. 19-25 ◽  
Author(s):  
S.M. Lima ◽  
A.K.R. Souza ◽  
A.P. Langaro ◽  
J.R. Silva ◽  
F.B. Costa ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Tellurite Glasses ◽  
Thermal Lens Spectroscopy

SOLVENT EFFECT ON ABSOLUTE FLUORESCENCE QUANTUM YIELD OF RHODAMINE 6G DETERMINED USING TRANSIENT THERMAL LENS TECHNIQUE

1999 ◽  
Vol 13 (16) ◽  
pp. 563-576 ◽  
Author(s):  
C. V. BINDHU ◽  
S. S. HARILAL ◽  
V. P. N. NAMPOORI ◽  
C. P. G. VALLABHAN
Keyword(s):  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Rhodamine 6G ◽  
Excited State Absorption ◽  
Fluorescence Yield ◽  
Dual Beam ◽  
Yield Values ◽  
Transient Thermal ◽  
Absolute Fluorescence

Dual beam thermal lens technique is successfully employed for the determination of absolute fluorescence quantum yield of rhodamine 6G laser dye in different solvents. A 532 nm radiation from a Q-switched Nd:YAG laser was used for the excitation purpose. The fluorescence quantum yield values are found to be strongly influenced by environmental effects. It has been observed that fluorescence yield is greater for rhodamine 6G in ethylene glycol system than in water or in methanol. Our results also indicate that parameters like concentration of the dye solution, aggregate formation and excited state absorption affect the absolute values of fluorescence yield significantly.

scholarly journals Eclipsing thermal lens spectroscopy for fluorescence quantum yield measurement

2013 ◽  
Vol 21 (15) ◽  
pp. 18592 ◽  
Author(s):  
C. Estupiñán-López ◽  
C. Tolentino Dominguez ◽  
R. E. de Araujo
Keyword(s):  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Yield Measurement ◽  
Thermal Lens Spectroscopy

Measurement of the absolute fluorescence quantum yield of rhodamine B solution using a dual-beam thermal lens technique

1996 ◽  
Vol 29 (4) ◽  
pp. 1074-1079 ◽  
Author(s):  
C V Bindhu ◽  
S S Harilal ◽  
Geetha K Varier ◽  
Riju C Issac ◽  
V P N Nampoori ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Rhodamine B ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Dual Beam ◽  
The Absolute ◽  
Absolute Fluorescence

Quantum Dots Fluorescence Quantum Yield Measured by Thermal Lens Spectroscopy

2014 ◽  
pp. 93-101 ◽  
Author(s):  
Carlos Estupiñán-López ◽  
Christian Tolentino Dominguez ◽  
Paulo E. Cabral Filho ◽  
Adriana Fontes ◽  
Renato E. de Araujo
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Thermal Lens Spectroscopy

Limitations Arising from Optical Saturation in Fluorescence and Thermal Lens Spectrometries Using Pulsed Laser Excitation: Application to the Determination of the Fluorescence Quantum Yield of Rhodamine 6G

1996 ◽  
Vol 50 (12) ◽  
pp. 1505-1511 ◽  
Author(s):  
J. Georges ◽  
N. Arnaud ◽  
L. Parise
Keyword(s):  
Quantum Yield ◽  
Thermal Lens ◽  
Fluorescence Quantum Yield ◽  
Rhodamine 6G ◽  
Optical Absorption Coefficient ◽  
Quantum Yields ◽  
Wide Energy Range ◽  
Relaxation Processes ◽  
Fluorescence Quantum Yields ◽  
Fluorescence Measurements

The high incident irradiances available with pulsed lasers can lead to a significant depletion of the ground-state population of the chromophore and to optical saturation effects. As a result, the optical absorption coefficient decreases as a function of the excitation energy and, because the amount of energy released by radiative and nonradiative relaxation processes depends on the amount of energy absorbed, nonlinear energy-dependent signals are obtained. Therefore, large errors can be introduced when fluorescence and photothermal data are used to determine fluorescence quantum yields. This work provides experimental results describing the effects of optical saturation on fluorescence and thermal lens measurements for rhodamine 6G in various media and over a wide energy range. It is shown that, when optical saturation is avoided, the photothermal method gives accurate absolute values of Φf ranging from 0.93 to 0.95, depending on the solvent. On the contrary, fluorescence measurements seem to be sensitive to additional experimental artifacts that are more difficult to characterize and to eliminate. Index Headings: Optical saturation; Thermal lens spectrometry; Fluorescence; Rhodamine 6G; Fluorescence quantum yield.

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